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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

PLTCHK testimonial
PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_ testimonial
_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

Chris testimonial
ChrisSenior SWE, LinkedIn

"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."

sleepy33 testimonial
sleepy33

"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."

Jake testimonial
JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord testimonial
nuggetlord

"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

Andy testimonial
AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99 testimonial
couchpotato99

"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."

Shruti testimonial
ShrutiData Engineer, Salesforce

"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."

midnightramen testimonial
midnightramen

"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."

Bianca testimonial
BiancaFrontend Eng, Figma

"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."

tambrahm007 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
toa

"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."

Showing 20 results
Agoda logo
Agoda
Medium
Software Engineer

Find two numbers that sum to a target

Array sum lookup Given an integer array nums and an integer target, find two distinct indices i and j such that: - nums[i] + nums[j] == target - i != ...

Coding & AlgorithmsArrays & Strings
11
0
96 people solved
Dec 14, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Merge multiple sorted arrays using min-heap

Problem You are given k sorted arrays of integers: - arrays[0], arrays[1], ..., arrays[k-1] - Each arrays[i] is sorted in non-decreasing order. - The ...

Coding & Algorithms
6
0
72 people solved
Oct 28, 2025
Amazon logo
Amazon
Medium
Software Engineer

Design an OOD restaurant management system

Object-oriented design: Restaurant management system Design an object-oriented system for a dine-in restaurant that supports the following: Functional...

Software Engineering FundamentalsLow-Level Design (OOP)Payments & Ledgers
11
0
111 people solved
Sep 5, 2025
Flatiron Health logo
Flatiron Health
Medium
Data Scientist

Write SQL window functions for streaks

Assume today is 2025-09-01. Using standard SQL (e.g., PostgreSQL), answer the following using window functions only (no procedural loops, no correlate...

Data Manipulation (SQL/Python)
4
0
31 people solved
Oct 13, 2025
C3 AI logo
C3 AI
Medium
Data Scientist

Decompress an encoded string

Decompress an encoded string Given an encoded string, return its decoded (decompressed) form. Use the following encoding rule: - A positive integer \(...

Coding & Algorithms
5
0
69 people solved
Jul 25, 2025
Instacart logo
Instacart
Medium
Software Engineer

Optimize file reads for password validation

Given a multi-gigabyte credentials file on disk with one record per line in the format user_id,salt,password_hash (hex), implement validate(user_id, p...

Coding & AlgorithmsIndexing & Query PerformanceFile & Media Storage
7
0
95 people solved
Jul 31, 2025
Meta logo
Meta
Medium
Data Engineer

Return count and renewal percentage of unreturned good copies

Tables: copies(copy_id, condition), checkouts(copy_id, checkout_date, return_date, renewal_count). Write a single SQL query that returns one row with ...

Data Manipulation (SQL/Python)
3
0
24 people solved
Sep 6, 2025
Nuro logo
Nuro
Easy
Software Engineer Locked

Parse logs and count error codes

This question evaluates parsing and sanitizing structured text, extracting specific fields, and performing frequency aggregation of identifiers such a...

Coding & AlgorithmsParsing & Interpreters
6
0
103 people solved
Feb 12, 2026
Amazon logo
Amazon
Medium
Software Engineer

Compute rightmost-smaller delay times

Given an integer array priorities, define delay[i] as the distance to the rightmost index j > i such that priorities[j] < priorities[i]; if no such in...

Coding & Algorithms
6
0
56 people solved
Sep 6, 2025
dYdX logo
dYdX
Medium
Software Engineer

Solve shortest and label-similar paths

Solve shortest and label-similar paths Part A — Unweighted shortest path: You are given an undirected, unweighted graph with vertices labeled 0..n-1 a...

Coding & Algorithms
5
0
41 people solved
Aug 7, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Group words into anagram lists

Given an array of strings, group the words into lists of anagrams and return the collection of groups in any order. For example, ["abc", "cab", "edf"]...

Coding & AlgorithmsArrays & Strings
8
0
111 people solved
Sep 6, 2025
SoFi logo
SoFi
Easy
Software Engineer

Solve Time-Window and Binary Swap Problems

This online assessment contained two coding problems: 1. Maximum requests in a time window You are given a non-decreasing integer array requestTimes, ...

Coding & AlgorithmsArrays & StringsSimulation & State Machines
8
0
95 people solved
Jan 20, 2026
Apple logo
Apple
Medium
Software Engineer Locked

Design ad click aggregator and file sync service

This question evaluates system design competencies in building scalable, reliable distributed services—covering high-throughput event ingestion and ag...

System DesignFile & Media StorageBatch & Stream Processing
25
0
272 people solved
Jan 22, 2026
Instacart logo
Instacart
Medium
Software Engineer

Demonstrate ownership and resilience

Behavioral & Leadership Prompts (Software Engineer Onsite) Context: You are interviewing onsite for a Software Engineer role. Answer the following pro...

Behavioral & Leadership
7
0
87 people solved
Sep 6, 2025
Apple logo
Apple
Medium
Data Scientist

Clarify status, education, and multi-role strategy

HR Screen: Candidate Information and Minicase Readiness (Data Scientist) 1) U.S. Work Authorization Provide your current employment/visa status and wo...

Behavioral & Leadership
13
0
92 people solved
Oct 13, 2025
Twitch logo
Twitch
Hard
Data Scientist

Design an A/B test for pre-roll ads

A/B Test: Reduce Mobile Live‑Stream Pre‑Roll Ad Frequency by 20% Context: You are designing an experiment on mobile live streams to evaluate reducing ...

Analytics & Experimentation
9
0
67 people solved
Oct 13, 2025
Speak logo
Speak
Hard
Software Engineer

Design speaking scenarios and auth/profile API

System Design Task: Speaking-Scenario Practice Feature + MVP Auth API Context: You are designing a new speaking-scenario practice capability for a lan...

System DesignSystem Design FundamentalsAPI Design
7
0
143 people solved
Sep 6, 2025
TikTok logo
TikTok
Easy
Data Scientist

Calculate Expected Draws for X > 0.8 in Uniform(0,1)

Calculate Expected Draws for X > 0.8 in Uniform(0,1) Scenario Quick probability check during a first-round screen to gauge statistical intuition. Ques...

Statistics & Math
9
0
77 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Software Engineer

Simulate robot on grid with obstacles

Simulate robot on grid with obstacles A robot starts at (0, 0) on an unbounded integer grid. You are given a sequence of commands consisting of charac...

Coding & AlgorithmsSimulation & State Machines
9
0
106 people solved
Jul 15, 2025
Pinterest logo
Pinterest
Hard
Data Scientist

Investigate Homepage Experiment Without Control Group: Methods and Metrics

Homepage Experiment Without a Control Group A social-media homepage team is analyzing a personalized feed. An intern accidentally launched a treatment...

Analytics & ExperimentationCausal InferenceExperiment Design (A/B Testing)
113
0
272 people solved
Jul 12, 2025
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